CVE-2023-43494: Jenkins core Jenkins Does Not Exclude Sensitive Vulnerability

MODERATE
Advisory Identifier: GHSA-279f-qwgh-h5mp
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CVSS 4.3
Published
Advisory Summary

CVE-2023-43494 is a MODERATE (CVSS 4.3) jenkins does not exclude sensitive vulnerability (General Security Weakness) affecting Jenkins core libraries in the Maven ecosystem. The issue involves jenkins does not exclude sensitive build variables from search. Remediation is available by upgrading affected packages to version 2.414.2, 2.424.

CVE-2023-43494 at a Glance

CVE Identifier CVE-2023-43494
GHSA Identifier GHSA-279f-qwgh-h5mp
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification General Security Weakness
Affected Product Jenkins core
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 4.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2023-43494

To remediate this vulnerability, upgrade all affected Jenkins core dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.jenkins-ci.main:jenkins-core fixed: 2.414.2 
<dependency>
    <groupId>org.jenkins-ci.main</groupId>
    <artifactId>jenkins-core</artifactId>
    <version>2.414.2</version>
</dependency>
org.jenkins-ci.main:jenkins-core fixed: 2.424 
<dependency>
    <groupId>org.jenkins-ci.main</groupId>
    <artifactId>jenkins-core</artifactId>
    <version>2.424</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.jenkins-ci.main

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2023-43494, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.jenkins-ci.main

Analyze the terminal output to locate any version of Jenkins core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.414.2), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.jenkins-ci.main command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under General Security Weakness. In Jenkins core, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Jenkins allows filtering builds in the build history widget by specifying an expression that searches for matching builds by name, description, parameter values, etc. Jenkins 2.50 through 2.423 (both inclusive), LTS 2.60.1 through 2.414.1 (both inclusive) does not exclude sensitive build variables (e.g., password parameter values) from this search. This allows attackers with Item/Read permission to obtain values of sensitive variables used in builds by iteratively testing different characters until the correct sequence is discovered. Jenkins 2.424, LTS 2.414.2 excludes sensitive variables from this search.

CVE-2023-43494 Affected Jenkins core Versions

2 component(s)
Fixed Versions:
2.414.22.424
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.main:jenkins-core
maven/org.jenkins-ci.main/jenkins-core
Maven
≥ 2.50
< 2.414.2
2.414.2
org.jenkins-ci.main:jenkins-core
maven/org.jenkins-ci.main/jenkins-core
Maven
≥ 2.415
< 2.424
2.424

References

NVD — CVE-2023-43494 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-43494
Security Fix Commit FIX COMMIT
https://github.com/jenkinsci/jenkins/commit/b8ac8cd4c51511b9f844846ba80a8aed054288c5
Jenkins core Source Repository REPOSITORY
https://github.com/jenkinsci/jenkins
Jenkins core Security Information SECURITY
https://www.jenkins.io/security/advisory/2023-09-20/#SECURITY-3261
Jenkins core Security Information SECURITY
http://www.openwall.com/lists/oss-security/2023/09/20/5

Frequently Asked Questions

What is CVE-2023-43494?
CVE-2023-43494 is a security vulnerability in Jenkins core involving Jenkins does not exclude sensitive build variables from search under General Security Weakness.
Which Jenkins core versions are affected?
Affected versions include releases prior to 2.414.2, 2.424 across affected packages: org.jenkins-ci.main:jenkins-core.
What version fixes CVE-2023-43494?
Upgrading to 2.414.2, 2.424 (or the latest patched release for your respective branch) resolves the vulnerability.
Is jenkins-core affected?
Yes, org.jenkins-ci.main:jenkins-core is affected in releases prior to 2.414.2, 2.424. Upgrade your dependency to 2.414.2, 2.424 or later.
What is the CVSS score of CVE-2023-43494?
CVE-2023-43494 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2023-43494?
CVE-2023-43494 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2023-43494?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.jenkins-ci.main'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-279f-qwgh-h5mp",
  "modified" : "2024-03-12T16:28:00Z",
  "published" : "2023-09-20T18:30:21Z",
  "aliases" : [ "CVE-2023-43494" ],
  "summary" : "Jenkins does not exclude sensitive build variables from search",
  "details" : "Jenkins allows filtering builds in the build history widget by specifying an expression that searches for matching builds by name, description, parameter values, etc.\n\nJenkins 2.50 through 2.423 (both inclusive), LTS 2.60.1 through 2.414.1 (both inclusive) does not exclude sensitive build variables (e.g., password parameter values) from this search.\n\nThis allows attackers with Item/Read permission to obtain values of sensitive variables used in builds by iteratively testing different characters until the correct sequence is discovered.\n\nJenkins 2.424, LTS 2.414.2 excludes sensitive variables from this search.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.main:jenkins-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.50"
      }, {
        "fixed" : "2.414.2"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.main:jenkins-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.415"
      }, {
        "fixed" : "2.424"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-43494"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jenkinsci/jenkins/commit/b8ac8cd4c51511b9f844846ba80a8aed054288c5"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jenkinsci/jenkins"
  }, {
    "type" : "WEB",
    "url" : "https://www.jenkins.io/security/advisory/2023-09-20/#SECURITY-3261"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2023/09/20/5"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-09-21T16:55:44Z",
    "nvd_published_at" : "2023-09-20T17:15:11Z"
  }
}